Re: [PATCH RESEND v4 0/3] drm/bridge: sii9234: use extcon to detect cable attachment

[Marek Szyprowski <m.szyprowski@samsung.com>]

+CC: Luca

On 30.06.2026 14:43, Henrik Grimler wrote:
> Hello,
>
> Friendly ping! This series has been reviewed/tested and still applies
> cleanly on drm-misc-next, could it be merged?
>
> Best regards,
> Henrik Grimler
>
> On Tue, Jun 02, 2026 at 08:36:47PM +0200, Henrik Grimler wrote:
>> Hi,
>>
>> This series fixes so HDMI through the sii9234 MHL chip works when
>> cable is hotplugged, by making the MHL chip use extcon cable detection
>> functions. Patch 3, that actually implements the extcon parts, is heavily
>> inspired by commit 688838442147 ("drm/bridge/sii8620: use micro-USB
>> cable detection logic to detect MHL") by Maciej Purski.
>>
>> Before these changes, HDMI only worked if cable was plugged in before
>> booting. If no cable was connected, then wlr-randr still showed HDMI
>> as connected, with 0x0 px, which confused at least some UIs (phosh)
>> and caused problems:
>> https://gitlab.gnome.org/World/Phosh/phosh/-/issues/828
>>
>> Tested on exynos4412-i9305.
>>
>> Best regards,
>> Henrik Grimler
>>
>> Signed-off-by: Henrik Grimler <henrik@grimler.se>
>> ---
>> Changes in v4:
>> - Collect tags
>> - Link to v3: https://lore.kernel.org/r/20250824-exynos4-sii9234-driver-v3-0-80849e716a37@grimler.se
>>
>> Changes in v3:
>> - Fix return of dev_err_probe in patch 2 and patch 3, spotted by
>>   Dmitry and Marek respectively.
>> - Change to depends on EXTCON || !EXTCON instead of select
>> - Collect tags for patch 1 (not 3 since there were (minor) changes)
>> - Link to v2: https://lore.kernel.org/r/20250724-exynos4-sii9234-driver-v2-0-faee244f1d40@grimler.se
>>
>> Changes in v2:
>> - Add dependency on extcon in patch 3. Issue reported by kernel test robot <lkp@intel.com>
>> - Link to v1: https://lore.kernel.org/r/20250721-exynos4-sii9234-driver-v1-0-2e47ed02f677@grimler.se
>>
>> ---
>> Henrik Grimler (3):
>>       drm/bridge: sii9234: fix some typos in comments and messages
>>       drm/bridge: sii9234: use dev_err_probe where applicable
>>       drm/bridge: sii9234: use extcon cable detection logic to detect MHL
>>
>>  drivers/gpu/drm/bridge/Kconfig   |   1 +
>>  drivers/gpu/drm/bridge/sii9234.c | 124 +++++++++++++++++++++++++++++++--------
>>  2 files changed, 102 insertions(+), 23 deletions(-)
>> ---
>> base-commit: a87fef0880c4f52769b5a3c2fc1b2d73aaa04eb3
>> change-id: 20231218-exynos4-sii9234-driver-d817d4b511d5
>>
>> Best regards,
>> -- 
>> Henrik Grimler <henrik@grimler.se>
>>
Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland